Boiler-grate



A. MASCI.

BOILER GRATE.

APPLICATION FILED JULY 23,1920.

1,379,272. Patented May 24, 1921.

ARMANDO MASGI, OF GENOA, ITALY.

BOILER-GRATE.

Specification of Letters Patent.

Patented May 24, 1921.

Application filed July 23, 1920. Serial No. 398,501.

To all whom it may concern:

Be it known that I, ARMANDO MASOI, a subject of the King of Italy,residing at Genoa, San Fruottuoso, Italy, have invented certain new anduseful Improvements in Boiler-Grates, of which the following is aspecification.

This invention relates to grates for steam boiler furnaces, and moreparticularly to the grate bars, the object of the invention being toprovide the same with a novel construction and arrangement offuel-supporting pockets designed to save fuel, and to obtain bettercombustion and a fire requiring a minimum of attention.

The object stated is attained by means of a combination and arrangementof parts to be hereinafter described and claimed, and in order that thesame may be better understood, reference is had to the accompanyingdrawing forming a part of this specification.

In the drawing, Figure 1 is an elevation of one of the grate bars; Fig.2 is a plan View showing a fragment of two adjacent ones of said bars;Fig. 3 is a section on the line 8-3 of Fig. 2, and Fig. 4 is across-section on the line 4-4 of Fig. 2.

Referring specifically to the drawing, the grate bars 5 are supported inthe fire box of the furnace in the usual manner, and they are of theusual shape, and held in parallel and laterally spaced relation by rods6 carrying spacer sleeves 7 which seat between adjacent ones of thebars.

On the top edge of each grate bar 5 is mounted a series offuel-supporting pockets 8 in the form of shallow trays having arectangular contour. These trays are spaced at their ends, and those ofone grate bar are spaced at their sides from the ones of adjacent bars.It will also be noted in Fig. 2 that the trays of adjacent bars are setstaggered or in break-joint order. The spacing of the trays enables theair flowing upwardly between the grate bars to freely pass through thespaces between the trays 1nto the fuel bed, and a copious supply of airis assured, there being nothing to impede the flow of air to the fire.Referring to Figs. 3 and 4:, it will be seen that the trays ta erdownwardly at their ends and sides, so t at the spaces between the traysexpand or flare downwardly, so as not to fill with ashes, and for thesame reason, the grate bars have a downward taper.

For the purpose of supporting the trays 8 in rigid position on the gratebars 5, the latter have top recesses 9 to seat end and bottom portionsof the trays. The bottoms of the trays also have recesses 10 running inthe direction of the ends thereof to seat the bars at the deepest orbottom portions of the recesses 9. Through the bottom of each tray alsoextends a stem 11 carried by the grate bar, and threaded at its upperend to take a nut 12 which is screwed down against the bottom of thetray on the inside thereof. The stem 11 has a head 13 which is embeddedin a recess 14; in the grate bar beneath the recess 9. The recesses 14and 9 are connected by a reduced passage 15 through which the stem 11extends into the recess 9 for connection of the tray therewith.

By the means hereinbefore described, the trays 8 are all separately andsecurely fastened down on the grate bars 5, and if any of the trays burnout or become otherwise damaged, they can be readily removed forrenewal.

The trays 8 extend throughout the entire area of the grate and supportthe bed of fuel. At the bottom of the fuel mass, the same fills thepockets formed by the trays. The fuel in these pockets causes the tireto burn for a considerable length of time without attention, and thefuel is completely consumed, perfect combustion resulting, and

also a saving of fuel.

I claim:

A grate comprising a plurality of parallel and laterally spaced gratebars, and fuel receivingpockets mounted on top of said bars, saidpockets consisting of shallow trays having bottom recesses to straddlethe bars,'the top edges of the bars having recesses to seat bottomportions of the trays, stems carried by the bars and extending throughthe bottoms of the trays, said stems having heads at their lower ends,and the bars having recesses to seat the stems, said recesses openinginto the second-mentioned recesses, and having enlarged bottom portionsto seat the heads of the stems, and nuts screwed on said stems forclamping the trays down on the bars.

In testimony whereof I afiix my signature.

ARMANDO MASCI.

